Gasket



Oct. 20, 1931. F. J. OVEN 1,828,471

\ GASKET Filed March 7, 1931 J WMWW Patented O'ct. 2o, 1931 UNITED STATES lagitTi-i-1 mvI f FRANK J'. OVEN, OF CHICAGO, ILLINOIS, ASTSIGNORHTGTVICIORMANUFACTU'RING.;

GASKET COMPANY, OF CHICAGO, HLTLINQS",L .A COBDRATION. QF IIIIIJINCHIS.`

GASKET Application med March 7. 1.931.( Ssamo.. 520.553..

This invention relates to gaskets and` more particularly to cylinder head gaskets.

It sometimes happens that the head of an internal combustion engine will shrink, warp or otherwise distort from excessive heat at some part thereof due to the design, shape or operation of the engine or Jfor other reasons. This will cause the joint between the head and the block to yield and possibly to open sufficiently to permit leakage. This is like ly to happen in an internal combustion engine because there is a higher temperature on the valve side of the engine than on'the opposite side. The unequal heating may cause the head to shrink transversely to release or open the joint sufiiciently to permit leakage.

My invention has for its object to provide a cylinder head gasket which will adjust itself automatically at the joint to compensate for any reasonable amount of shrinkage in the head due to the eXcess heating of the head at the valve side of the engine. i Y

A further object of the invention is to provide a simple and novel reenforcement for a cylinder head gasket along that edge which is located where distortion ismost likely to happen to automatically compensate for shrinkage in the head.

In the accompanying drawings illustrat-v ing a selected embodiment of the invention Fig. l is a plan view of a cylinder head gasket for an overhead valve engine;

Fig. 2 is a sectional View on the line 2 -2 of Fig. l;

Fig. 3 is a fragmentary sectional View.

Referring to the drawings, the gasketv 4 has cylinder openings 5, water circulation openings 6, bolt openings 7 and tappet rod openings 8. The gasket herein selected to il-V lustrate the invention comprises a layer 9 of gasket material such as asbestos or other suitable compressible material, a bottom metal layer 10 and a topmetal layer 11 of copper or other suitable metal. Therbottom layer has flanges 12 which project up through the openings 5, 6 and 8 and overlap the edges of the top layer about said openings. Any other materials and any other construction of gasket suitable for the purpose or to. which the invention may be adaptedLmaybe/employed: The topp metaljlayer i Il isprovidedgwithan-integral hem 13 which extends preferablyrom endvto endof the gasket. and'is ,lappedbeneath the top metal layer and embedded Vin the layer).v This hem may vary in width butjI have found it satisfactoryto have it eXtendpart-ly across that part Vofthe, gasketV illustrated whichcontains the openings and 7', it being suilicient to provide a. hem of'. substantial width along that edge ofthe gasket which is` located at the valve side of the'engine, and which may vary injwidth as desired. It'will'also be understood that the openingsin the gasket vary in position for'diierent engines and some Y mayllb'e located'partly in the hem as shown or some Vmay be located'wholly within the hem orthe hem may be entirelyclear of openings. Thehem is an integralpart of thejtop metal layer 11 and'fis bentinwardly upon this layer on the Vunderside thereof` in snug contact therewith'v and isembedded inthe asbestos layer 9 whenthe parts ofthe gasket are assembled: When the` 'gasket is secured in placebetweenthe block andthe bead of the engiiieto, seal .the joint, that part of the asbestpslayer, under the hem willJbe com'- pres'sedfto'a greater extentl than other parts fthe asbestoslayer except where the flanges 12..,ov-erlap-.j the. single thickness 'of' the top metal layer. along the marginal edge of that part of the gasket which is most likely to be distorted, any release of pressure afforded by the securing bolts upon the gasket at the valve side of the engine due to shrinking, warping or other distortion of the head from excessive heating will be compensated for by expansion of the asbestos layer 9 beneath the hem. This distortion most often occurs at the valve side Since this hem is to extend of the engine and for this reason the hem i is usually provided along the side of gasket to be disposed at the valve side of the engine. The gasket may be used as a replacement in engines where the head has shrunk or warped or distorted Jfrom excessive heatingv at the valve side of the engine because it will com'- press more readily where there is an absence of double thickness of metal on the top side of the asbestos layer and thereby the:` head;

may be tightly clamped upon the gasket to form a tight seal notwithstanding irregularities in the face of the head lying upon the gasket.

I have shown the invention in one form of gasket for which it is adapted but I do not restrict the invention thereto nor to the particular size, construction or materials of the gasket, but reserve the right to make any changes therein Within the scope of the following claims.

I claim: Y

l. A gasket comprising a layer of compressible gasket material having a metal layer thereon, said metal layer being folded upon itself to form an integral hem lying snugly on one side thereof and extending-.along one edge of the gasket. Y

2. A gasket comprising a layer of compressible gasket material, a bottom metal layer and a top metal layer, one of said metal layers having an integral hem bent inwardly to lie snugly against the inner side thereof and against the compressible. layer and extending along one edge of the gasket.

3. A gasket comprising a layer of oompressible gasket material, a bottom metal layer and a top metal layer, one of said metal layers having an integral hem bent inwardly to lie snugly against the inner side thereof and against the compressible layer and eX- tending along one edge of the gasket which will be located at the valve Vside of the en gine in which the gasket is installed.

4. A gasket comprising a layer of compressible gasket material, a bottomY meta] layer and a top metal layer, said top metal layer having an integral hem bent inwardly under said top metal layer to lie snugly against the underside thereof and upon the eompressible layer and extending alongthat edge of the gasket which will be located at the valve side of the engine in which the gasket is installed.

FRANK J. OVEN. 

